A Simplified CE Stopping Criterion for BICM-ID System

2013 ◽  
Vol 433-435 ◽  
pp. 1530-1534
Author(s):  
Miao Miao Li ◽  
Jian Ping Li
Keyword(s):  
Computational Complexity ◽  
Iterative Decoding ◽  
Rayleigh Fading ◽  
Coded Modulation ◽  
Cross Entropy ◽  
Stopping Criterion ◽  
Stopping Criteria ◽  
Adaptive Thresholds ◽  
Simulation Results ◽  
Bit Interleaved Coded Modulation

The iterative process of bit-interleaved coded modulation iterative decoding (BICM-ID) leads to the increase of computational complexity and decoding delay at the receiver, although it owns remarkable bit-error-rate (BER) performance both in additive Gaussian noise (AWGN) channel and Rayleigh fading channel. A variety of the stopping criteria are put forward to reduce the unnecessary iterations in the process. This paper presents a simplified cross-entropy (CE) stopping criterion based on CE criterion, which sets self-adaptive thresholds for different SNRs to decide whether to calculate the CE in the receiver. Simulation results show that the simplified CE criterion can obtain a better performance and lower computational complexity. The iterative number of the simplified CE criterion is about 12.2% less than the conventional CE criterion.

An Improved Simplified-CE Stopping Criterion for BICM-ID System

2013 ◽  
Vol 846-847 ◽  
pp. 1262-1265
Author(s):  
Miao Miao Li ◽  
Jian Ping Li
Keyword(s):  
Iterative Decoding ◽  
Rayleigh Fading ◽  
Signal To Noise Ratio ◽  
Coded Modulation ◽  
Cross Entropy ◽  
Stopping Criterion ◽  
Transmission Scheme ◽  
Stopping Criteria ◽  
Bit Interleaved Coded Modulation ◽  
Efficient Transmission

Bit-interleaved coded modulation iterative decoding (BICM-ID) is an excellent bandwidth efficient transmission scheme,which owns remarkable bit-error-rate (BER) performance both in additive Gaussian noise (AWGN) channel and Rayleigh fading channel.But it leads to the increase of computational complexity and decoding delay at the receiver at the same time. In order to decrease the unnecessary iterations ,a variety of the stopping criteria are put forward . This paper presents an improved simplified cross-entropy (CE) stopping criterion based on Simplified-CE criterion, which calculates the value of CE just one time when Signal to Noise Ratio (SNR) is under 2dB to simplified the iterative process. Simulation results show that the improved Simplified-CE criterion can own the least iterative number when the SNR is under 2dB.And when the SNR is from 2.5dB to 4dB, it is about 12% less than CE criterion in the average iterative numbers.

scholarly journals Bit-Interleaved Coded Modulation Systems with Iterative Decoding and Partial Reusing QAM Signal Points

2011 ◽  
Vol 1 (03) ◽  
Author(s):  
Nguyen Quang Tuan ◽  
Do Quoc Trinh ◽  
Tran Xuan Nam ◽  
Dinh The Cuong
Keyword(s):  
System Performance ◽  
Iterative Decoding ◽  
High Energy ◽  
Coded Modulation ◽  
Low Energy ◽  
Signal Energy ◽  
Shaping Technique ◽  
Simulation Results ◽  
Equivalent Distance ◽  
Bit Interleaved Coded Modulation

A new method of reusing a subset of an M-QAM signal constellation is presented for Bit-Interleaved Coded Modulation systems with Iterative Decoding (BICM-ID). In addition to the remapping of high-energy signals to low-energy signals in order to save the average signal energy as a shaping technique known so far, a new scheme of remapping low-energy signals to high-energy signals is proposed in order to gain the equivalent distance when decoding bits, often called the Squared Euclidean Weights (SEW). Numerical analysis and simulation results show that the partial reuse of the signals in the BICM-ID system with 16-QAM can improve the system performance in terms of lowering the bit error rate in the error floor region.

THIẾT KẾ BỘ XÁO TRỘN CHO HỆ THỐNG BICM-ID TRUYỀN DẪN QUA KÊNH PHA ĐINH

2020 ◽  
pp. 59-68
Author(s):  
Thắng
Keyword(s):  
Iterative Decoding ◽  
Coded Modulation ◽  
Bit Interleaved Coded Modulation

Bài viết đề xuất một xáo bộ trộn bít (gọi là New-block) sử dụng trong hệ thống BICM-ID (Bit-Interleaved Coded Modulation with Iterative Decoding) trên kênh pha đinh Rayleigh. Nó mang lại cho hệ thống giá trị hiệu suất BER (Tỷ lệ lỗi bit) xấp xỉ với bộ xáo trộn bít giả ngẫu nhiên ở vùng sàn lỗi, nhưng có phần cứng đơn giản hơn.

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